Apparatus for conditioning valves and valve seats



Aug. 16, 1938. R. LINDSEY 2,126,789

- APPARATUS FOR CONDITIONING VALVES AND VALVE SEATS Filed NOV. 4, 1933 2Sheets-Sheet 1 A Z5 1 1 1:. f 1% I M v Inventor:

R. LINDSEY Aug. 16, 1938.

APPARATUS FOR CONDITIONING VALVES AND VALVE SEATS Filed NOV. 4, 1933 2Sheets-Sheet 2 In UP]: for.

Patented Aug. 16, 1938 STATES PATENT 'OFFICE APPARATUS FOR CONDKTIONINGVALVES AND VALVE SEATS '7 Claims.

This invention relates to apparatus for grinding, facing, seating orotherwise conditioning valves and valve seats, particularly the valveand valve seats in internal combustion engines.

An object of the invention is to provide a valve grinding tool of thecharacter described which may be easily and accurately operated withoutdismantling the valves and attendant parts, whereby to save time, laborand expense.

Another object is to provide apparatus such as described which when inplace may be efficaciously operated to grind or otherwise condition thevalve only or the seat only or to simultaneously grind or otherwisetreat the valve and its seat.

A further object is to provide a portable valve grinder of the characterdescribed in which the valve and valve seat treating element is rotatedagainst the valve and its seat or the seat or the valve rotated againstthe element whereby an exact treatment to meet'the condition to becorrected may be carried out with uniformity and accuracy.

Yet another object is to provide apparatus such as described in whichthe grinding, facing, polishing or conditioning, as required, may beeffected with various types of treating tools subject to readyattachment to the apparatus and without necessitating the use ofobjectionable and damag- 1 "ing gritty compounds, powders and the likesuch as are usually applied to the valve and seats.

Still another object of the invention is to provide a new and highlyefficient conditioning or grinding tool shaped to permit of its readyapplication to the work and provided with portions which extend betweenthe valve and its seat in such manner as to provide for a selective orsimultaneous treating of the opposed surfaces of the valve and its seatand to insure uniformity and accuracy of operation thereof.

The invention possesses other objects and features of advantage, some ofwhich, with the foregoing, will be set forth in the following descrip-;,tion of the preferred form of the invention which is illustrated inthe drawings accompanying and forming part of the specification. It isto be understood, however, that variations in the showing made by thesaid drawings and description may be adopted within the scope of theinvention as set forth in the claims.

Referring to the drawings:

Fig. 1 is a vertical sectional view of the apparatus of this inventionas when in use;

Fig. 2 is a top plan view of the apparatus;

Fig. v3 is a sectional view taken on the plane of line 3--3 of Fig. 1;

Fig. 4 is a sectional view taken on the plane of line 4-4 of Fig. 1;

Fig. 5 is a sectional view taken on the plane of line 5-5 of Fig. 1;

Fig. 6 is a bottom plan view of the grinding element or tool;

Fig. 7 is a vertical section of a modified form of grinding element;

Fig. 8 is a bottom plan view of the element shown in Fig. 7;

Fig. 9 is a side elevation of another form of element as used forreaming purposes;

Fig. 10 is a bottom plan view of the element shown in Fig. 9;

Fig. 11 is a side elevation of another type of element used for dressingand smoothing the valves and their seats;

Fig. 12 is a perspective view of a hand operated form of the invention.

One embodiment of the invention, as shown in the accompanying drawings,comprises a portable motor driven machine primarily made up of anelectric motor i, a tubular motor shaft 2, a valve and valve seatgrinding or conditioning element or tool 3 carried on and rotated bysaid shaft, and a valve engaging rod 4 in the tubular shaft 2 and whosefunction is to either hold the valve against rotation or to rotate thevalve, as will be hereina after fully explained.

As here shown the tubular motor shaft 2 supports a chuck 5 on its lowerend, said chuck having a split sleeve 6 clamped against the tubularshaft by a nut 1 whereby to fix the chuck for rotation with the shaft orto loosen it for permitting relative rotation of the shaft. A nut 8 onthe shaft 2 also holds the chuck in place.

The grinding or conditioning element 3 is afiixed to the chuck by screws9, and comprises a cylindrical body Ill telescoping the chuck andprovided with downwardly and inwardly inclined tool appendages H in asomewhat conical arrangement. These appendages are spaced apartsufficient to permit the valve to be treated to be positioned within thetool, with the appendages ll disposed between the opposed faces of thevalve and its seat. In Fig. 1 is shown a valve A raised above its seat Bwith the tool disposed as above stated in position to grind or otherwisecondition the valve and seat. It should be noted that the inner andouter faces of the tool appendages are disposed at an angle of 45degrees to correspond with the standard 45 degree angle of the presentday valve and seat faces although,

if necessary, a tool with its working appendages at other angles couldbe readily substituted for the one here shown and described.

The type of tool or grinding element, here shown in Figs. 1 and 6,comprises three appendages each provided on its inner and outer faceswith an abrasive grinding surface [2. One way of providing such abrasivesurfaces is to mold or otherwise cause to be adhered to the appendagesan abrasive grinding compound which becomes as it were an integral partof the tool. However, other forms of grinders may be used, as forexample the carborundum wheel l4 shown in Fig. '7, wherein the wheel isshown with but two appendages l5 but otherwise is of the same form asshown in Figs. 1 and 6.

Another modification is the cutter tool shown in Figs. 9 and wherein theappendages I5 are fluted as at E6 to provide for refacing, reaming orcutting the valves and valve seats. Still another type of tool, as shownin Fig. 11, is for finishing and smoothing valves and valve seats andhas its appendages l6 provided with steel rollers arranged to engagebetween the valve and its seat. It will now be seen that various typesof tools embodying the spaced appendage construction of this inventionmay be readily interchangeably employed in the machine to suit thevarious kinds of conditioning required of valves and valve seats.

To fit the machine to the Work, as shown in Fig. 1, it is only necessaryto take off the cylinder head, not shown, and the tappet cover piece,also not shown, then lift or pry up the valve to be treated with asuitable tool under the valve spring seat and insert the tool element 3,the raised valve passing between the appendages H. Next the valve springseat is partially released and through its spring clamps the toolappendages between it and the valve seat with the abrasive surfaces l2in close engagement with the opposed working faces of the valve andvalve seat, as shown in Fig. 1. It is now apparent that the applicationof the machine is effected without necessitating any disassembling ofthe valve.

The rod 4 is now adjusted to engage the valve, it being noted that thespring I1 operates to yieldingly urge the rod against the valve. At itslower end the rod 4 carried a blade l1 removably held in a slot l8 bypin I9 and adapted to engage in the usual slot (not shown) in the top ofthe valve. With this arrangement the valve is prevented from turningrelative to rod 4 and in cases where the valve has pin holes instead ofthe slot, the blade I? is removed and a properly formed holder, notshown, may be substituted.

Assuming that it is desired to simultaneously treat the valve and itsseat, then the nut 1 is tightened on the conical threads 2| of splitsleeve 6 to clamp the chuck 5 for rotation with the motor shaft 2. Tonow hold the valve against rotation in order that the tool appendage IIwill treat or grind equally on the valve and valve seat, it is necessarythat the rod 4 be held against turning. This is done by tightening clamp23 on the upper end of rod 4, the clamp being carried by the bracket 24which is carried on the upper side of the motor housing 25. It should benoted that the shaft 2 extends above the motor housing and its upper end26 is split and provided with conical external threads 21. A nut 28 isturned on said threads and when loosened the shaft 2 turns freelyindependent of rod 4.

On now starting motor I the shaft 2 operates to turn the tool element 3and the appendages l I will treat equally the opposed faces of the valveand its seat. It is now seen that the valve and seat may besimultaneously ground, refaced, or smoothed as the case may be dependenton the type of tool used in the chuck 5, and that the treatment will beuniform in the valve and its seat which are both stationary during thissimultaneous operation.

If it is desired to grind or otherwise treat the valve alone, then thenut 'I'is loosened to permit the shaft 2 to turn relative to the chuck 5and tool element, whereas clamp 23 is loosened to free rod 4 forrotation. To make a, driving connection between the shaft 2 and rod 4whereby to rotate the latter, the nut 28 is tightened and the split end26 of shaft 2 is clamped to rod 4.

On now starting the motor 1 and upon holding chuck 5 with any suitabletool, not shown, to prevent rotation of the chuck, it is seen that therod 4 will rotate with shaft 2 and thereby rotate thevalve whereby togrind valve upon the stationary tool appendages bearing against thevalve face to be treated. In this manner the valve may be ground orotherwise treated to the exclusion of the valve seat.

To grind or otherwise treat the seat to the exclusion of the valve, theoperator loosens clamp 23 and tightens nuts 28 and I. The motor drivesshaft 2 and rod 4 which turns the valve and the shaft, rod and valveturn as one whereby the outer faces of the tool appendages operateagainst the seat only to treat it in the desired manner dependent on thetool mounted in the chuck 5.

In Fig. 12 I have shown a hand operated device comprising a crank 39having a chuck 3! to hold the grinding or treating tool 32. This formpermits of the advantageous use of the grinding and treating tools ofthe invention by hand.

It will now be apparent, with reference to the foregoing description andaccompanying draw= ings, that the embodiments. of the invention heredisclosed will provide the objects and advantages of the invention in aparticularly elficacious manner.

In some instances it may be preferable to regulate the tension of thevalve spring of the valve being treated. This may be done by holding thevalve spring seat raised with a suitable tool, and thereby adjust theresistance to the conditioning element, a much-desired feature.

I claim:

1. In valve and valve seat conditioning apparatus, a motor, a tubularmotor driven shaft, a chuck, means for operatively connecting anddisconnecting said chuck relative to the shaft, a valve and valve seatconditioning element removably mounted on said chuck and arranged to beengaged with opposed faces of a valve and its seat, a valve holding rodrotatably mounted in the tubular shaft, means on said rod for engagingthe valve to prevent relative rotation of the valve and rod, means forreleasably holding the rod against rotation, and means for establishinga driving connection between said shaft and said rod.

2. A valve conditioning apparatus comprising an element suitable tocondition a valve, so constructed as to be applied and removed frombetween a valve and its seat while the valve stem is in its guide, saidelement having a body portion and a tool member, said tool member beingconstructed to operate at a fixed angle to the body portion and meansfor rotating the valve while the valve is engaged with the conditioningelement.

3. A valve conditioning apparatus comprising a motor, a valveconditioning element, a valve engaging member, and means for fasteningsaid valve engaging member against rotating with said Valve conditioningelement and means for establishing a driving connection between saidmotor and said valve conditioning element.

4. A valve conditioning apparatus, comprising an element suitable tocondition a valve, so constructed as to be applied and removed frombetween a valve and its seat while the valve stem is in its guide, saidelement having a body por-- tion and a concave tool member, said toolmember being constructed to operate at a fixed angle to the body portionand means for rotating the conditioning element while it is engaged withthe valve.

5. A valve seat conditioning apparatus comprising an element suitable tocondition a valve seat so constructed as to be applied and removed frombetween a valve and its seat while the valve stem is in its guide, saidelement having a body portion and a convex tool member, said tool memberbeing constructed to operate at a fixed angle to the body portion, andmeans for rotating the conditioning element while it is engaged with theValve seat.

6. A valve conditioning element comprising an element constructed so asto be applied and removed from between a valve and its seat when thevalve stem is in its guide, said element having a body portion and aconcave tool member, said tool member being constructed to operate at afixed angle to the body portion.

'7. A valve seat conditioning element comprising an element soconstructed as to be applied and removed from between a valve and itsseat while the valve stem is in its guide, said element having a bodyportion and a convex tool member constructed to operate'at a fixed angleto the body portion.

ROY LINDSEY.

